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vol.24 número3INFLUÊNCIA DA MASSA CORPORAL SOBRE CARACTERÍSTICAS REPRODUTIVAS E LONGEVIDADE DE FÊMEAS DE PODISUS NIGRISPINUS (DALLAS) (HETEROPTERA: PENTATOMIDAE) índice de autoresíndice de assuntospesquisa de artigos
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Idesia (Arica)

versão On-line ISSN 0718-3429

Resumo

ZEGARRA ZEGARRA, Rosario. BIODIVERSITY AND TAXONOMY OF SOUTHERN PERU DESERTIC FLORA: FAMILY NOLANACEAE. Idesia [online]. 2006, vol.24, n.3, pp.7-18. ISSN 0718-3429.  http://dx.doi.org/10.4067/S0718-34292006000300002.

Although the southern Peru and northern Chile coastal desert formations represent one of the driest deserts of the world they allow the development and reproduction of more than 200 phanerogamic plant species. This South American desertic flora is particularly rare and very interesting under taxonomic, ecological, and fisiogenetic point of view. As a result of an intensive and continuous evolution under the very hard growing conditions, this special desertic vegetation have become adapted and tolerant to the most common abiotic stress of the arid and hiperarid agroecological zones, conspicuously displaying tolerance to drought, salinity, boron toxicity and others stress. Dry botanical seeds shet to the ground after very short growing period and early flowering by several desertic species surprisinly remain viable in the hot sandy desert for more than five, ten and even twenty years. The occasional occurrence of a favorable winter weather conditions with a very dense and low fog dampens the sandy soils of coastal plains and hills allowing the germination, development and fast reproduction of this particular vegetation. In some places the cycles on Loma vegetation can be every year, or every five, ten, twenty or more years in a mysterious timing combinations of favorable climatic conditions and loma formations. In the paper, the writer describes eleven species of Nolana (Nolanaceae) which are mainly endemic of the Loma formation of southern Peru desert.

Palavras-chave : Nolanaceae; arid coastal vegetation; biodiversity.

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